Option:
1: SL-M5100-L(2 Speed)：no optical display
2. SL-M4100-R(10 Speed)：with  optical display
3. SL-M5100-R(11 Speed) ：with  optical display
4. SL-M6100-R(12 Speed) ：with  optical display
5. 2×10 Speed set：SL-M5100-L(2 Speed) + SL-M4100-R(10 Speed)
6. 2×11 Speed set：SL-M5100-L(2 Speed) + SL-M5100-R(11 Speed)
7. SL-M7100-L(2 Speed) ：no  optical display
8. SL-M7100-R(12 Speed) ：no  optical display
9. SL-M7100-L+R( 2x12 Speed)： SL-M7100-L(2 Speed) + SL-M7100-R(12 Speed)

Model: SL-M4100-R
Speed: 10 Speed
Right only, come with inner cable
Quicker lever access and light operation
OPTICAL GEAR DISPLAY for easy visible gear position

Model: SL-M5100-R
Speed: 11 Speed
Right only, come with inner cable
Quicker lever access and light operation
OPTICAL GEAR DISPLAY for easy visible gear position

Model: SL-M6100-R
Speed: 11 Speed
Right only, come with inner cable
Quick and easy shifting
Quicker lever access and light operation
Easily-visible gear position indicator option improves shifting control

Model: SL-M5100-L
Speed 2 Speed
Left only, come with inner cable
Light and responsive front shifting improves efficiency and control
Shift both up and down with a single lever
Lightweight and compact design
For 2x11 and 2x10-speed

Model: SL-M7100
Speed: Left 2 Speed / Right 12 Speed
Come with inner cable
Shifter type: RAPIDFIRE PLUS MONO
With quick lever access and a light and responsive lever action, RAPIDFIRE PLUS SLX shift lever delivers smooth control out on the trail. The new I-SPEC EV lever offers a wide range of adjustments including increased lever slide range.